It handles all possible combination of the hex bytes, including NaNs, Infinities, Normalized and Subnormal Numbers...

This crazy DC stuff spent me a few days to write, optimize, polish and squeeze so that it works within the tight 255 character bound...You can modify it easily for other IEEE754 numbers, say, half, double, double-extended, quadruple(I hope someone will find this useful and submit more dc code to commandlinefu!)